brown Inch worm with yellow hat (Parasitized caterpillar - Chalcid wasp)

by Wendy
(Mississippi)

Brown appx. 1" long with yellow mass on back

Comments for brown Inch worm with yellow hat (Parasitized caterpillar - Chalcid wasp)

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Parasitized caterpillar - Chalcid wasp
by: Moni

Wendy
Your inchworm has been parasitized by a small wasp. The parasites are the larval stage of Euplectrus, a chalcid wasp parasitoid.
This genus of chalcid wasp lays eggs on butterfly and moth caterpillars.

This chalcid wasp is very small. It is mostly black with tan to yellowish spot on it's abdomen as well as has lighter colored legs and antennae.
The larvae are usually found in clusters like you see on the parasitized caterpillar. If the clusters or bumps you see are fuzzy, then the larva has pupated into a cocoon.


We talk about good bugs and bad bugs in the garden. The wasp is a good bug since it will lay eggs on many pest species of caterpillars, which will stop the caterpillar from feeding, which reduces damage to our garden crops. As the larvae from the wasp emerge, and feed on the caterpillar it will die...keeping the caterpillar from maturing. These caterpillars should be left alone, so the wasps can emerge and do their thing.

This inchworm may not be a pest species but these wasps do keep the populations of many caterpillars in check. Balance of nature.
Interesting find! Thanks for sharing with everyone!

This wasp does not sting.

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Big brown caterpillar (Imperial moth caterpillar)

by Maggie
(Ontario)

What is this?

What is this?

I was guessing a hawkmoth or imperial but have no idea what this is.

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Imperial moth caterpillar
by: Moni

Maggie
Yes, your caterpillar is that of an Imperial moth. A close up photo would have helped, but the rear coloration is distinct to know which of the silkmoth caterpillars it is.

These are found in eastern US, Ontario and Quebec.
This is one of the silkmoth (Saturniidae family) caterpillars...most get very large ... rather spectacular in color and size! The caterpillars are come in light to dark green in color, or brownish ones like you found can vary from orangish to chocolate brown.

This caterpillar feeds on leaves of Bald Cypress, basswood, birch, cedar, elm, hickory, Honeylocust, maple, oak, pine, Sassafras, Sweetgum, sycamore, walnut.


They have one generation per year in the north, two in the south. It may be moving to find a place in the soil to pupate and live for the winter. They pupate in a mulched or leaf litter area underground in loose soil.

Adult moths do not feed and do come to lights at night.

Tho this caterpillar is a bit hairy and bristly it does not sting or cause a rash.

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Brown caterpillar with yellow slashes (Salt marsh caterpillar)

by Ed Lau

Seems to love peas, that was where it was found, in Jackson Hole, WY.

Appears to be about 2" long.
Prominent yellow 'slashes' along the side.
'Tufts', not spikes, along the body, which seems to be predominantly brown.

I have two pictures, top and side, I don't know if I can upload both...

Comments for Brown caterpillar with yellow slashes (Salt marsh caterpillar)

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Salt marsh caterpillar
by: Moni

Ed
Your caterpillar is probably the salt marsh caterpillar. Without a clearer photo, especially of the head, we can not be positive. These caterpillars are highly variable, they can be a challenge to ID.
The caterpillars do vary a lot in color and look like several fall fuzzy caterpillars, but if it has a black face then you know it is a salt marsh. If it has a yellowish face then it is the other fuzzy caterpillar the Virginian Tiger moth.

They turn into white moths with black dots on the wings and with orange abdomens. The male moths have colored hind wings while the female hind wings are usually white.

The caterpillars come in various colors - whitish to brown to black, with long bristly hairs.

This caterpillar is found in weedy roadsides, prairie grasslands, meadows, and such areas. Larvae feed on many mostly weedy plants including pigweed, ground cherry and mallow, plus crops such as alfalfa, asparagus, bean, beet, cabbage, carrot, celery, clover, corn, cotton, lettuce, onion, pea, potato, soybean, tobacco, tomato, and turnip.
They are not considered a pest.

These insects are found all over North America.
The moths come to lights at night.

This caterpillar will not sting or cause a rash.

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large green caterpillar (Carolina Sphinx - Tobacco hornworm)

by Katie
(Louisville, KY)

Found this caterpillar after it had eaten nearly all the leaves on my tomato plant. Located in Louisville, KY. It was a pretty quick eater - took the whole plant down in about 48hrs. There was another smaller caterpillar (same type) on the plant.

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Carolina Sphinx - Tobacco hornworm
by: Moni

Katie
Your caterpillar is the Carolina sphinx or tobacco hornworm. It feeds on all of the solanaceous plants which include tomato, potato, eggplant and peppers.
Like you noticed, if you find one, there are usually more. The most common sign of them is stripped foliage and the dark droppings they leave after eating.

The adult moth is large, gray, and has six pairs of yellow spots on its abdomen. They fly at dusk and can be mistaken for a hummingbird. The moth feeds on nectar of deep-throated flowers like honeysuckle, moonflower, or petunia.

This caterpillar has 7 angled white lines along the side while its relative the tomato hornworm has 8. The tobacco hornworm also has a red tail while the tomato hornworm has a black tail...seems like it should be the other way around!
There are 2 or more generations per year depending on location. They are found thru out North America.

They can be a pest of tomatoes, as you have learned the hard way. There are parasitic wasps that lay eggs in the hornworms that keep them under control most of the time. If you see tufts of white little cotton-ball looking things on the caterpillar...do not kill the caterpillar! Those are the good bugs controlling your pest. That hornworm will not eat anymore...it will die since the wasp has eaten it from the inside.

If you need to control them, just pick off and smash or drop in warm soapy water.

This caterpillar does not bite or sting.

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Green caterpillar (Hackberry emperor caterpillar )

by Nicolr
(Norfolk, VA)

Found in Norfolk, Virginia on August 23. It was just crawling along my deck railing.

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Hackberry emperor caterpillar
by: Moni

Nicolr
Your caterpillar is the hackberry emperor. This caterpillar feeds on hackberry tree leaves. These are typically found in wooded areas.

The adult butterfly is brown with distinctive spots on the wings. The caterpillars and adults look similar to the tawny emperor.

The adults feed on sap, fluids from dung and carrion. They will also sit on people to sip on the minerals and salts from sweat. :)

This insect is found through out North America except the NW quadrant.

Tho the caterpillar is spiny it will not sting nor cause a rash.

Thanks for the nice photo and adding this insect to our list!

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Yellowish White Caterpillar with a tail? (White-marked tussock moth caterpillar)

by Taylor Brewer
(Frankfort, Kentucky)

This little dudes on my porch right now. I didn't touch it because it looks evil! It has red spots on it. Can anyone identify it? I've never seen one before. I'm in Frankfort KY

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White-marked tussock moth caterpillar
by: Moni

Taylor
Your insect is a white-marked Tussock moth caterpillar (Orgyia leucostigma).

These are common in the eastern half of North America in wooded areas. They overwinter as eggs then emerge in spring, go thru several larval stages then turn into the moth. The female moth is flightless. The male moth is brown with a distinctive darker pattern and a single white spot on each forewing.

Caterpillars feed on many hardwood or conifer trees.

CAUTION: Avoid handling the caterpillar, its hair is known to cause allergic reactions, especially in areas of the body with sensitive skin. If a severe reaction occurs, seek medical attention.

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Dark Horned Smooth Caterpillar (Hickory Horned Devil caterpillar)

by Sherry M.
(Whispering Pines, NC USA)

Almost 4 inches long

Almost 4 inches long

Almost 4 inches long found on gravel driveway

Found in Whispering Pines, NC (Moore County) USA, crawling on our gravel driveway. I let it crawl into a clear bowl for photographing. My 4 year old daughter saw it first, and we photographed it and looked on the internet to identify it...but couldn't see a picture just like it (it has no "hair").
Thank you for your help in identifying this creature. We released it back into my flowerbed after about 10 minutes.

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Hickory Horned Devil caterpillar
by: Moni

Sherry
You have found a hickory horned devil caterpillar. They turn into a beautiful large moth called the Regal moth (some call it the Royal Walnut moth).

The larvae feed on leaves of ash, burning bush, butternut, cotton, gum, hickory, lilac, pecan, persimmon, sumac, sycamore, and walnut. The larva pupate in the soil.

Adult moths of this family do not feed. It overwinters as a pupa.

Thank you for letting it go. It may be crawling around to look for a place to pupate for the winter.

Tho the caterpillar looks dangerous, it is harmless.

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